Piston ring and thermal spray coating used therein, and...

Details Piston ring and thermal spray coating used therein, and... Piston ring and thermal spray coating used therein, and...

2007-11-06

2007-11-06

McNeil, Jennifer (Department: 1775)

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

C428S312800, C428S318400, C428S539500, C428S615000, C428S679000, C428S680000, C427S456000, C427S455000

Reexamination Certificate

active

10531423

ABSTRACT:
The piston ring of the present invention comprises a thermal spray coating comprising chromium carbide particles having an average particle size of 5 μm or less, and a matrix metal composed of a Ni—Cr alloy or a Ni—Cr alloy and Ni at least on an outer peripheral surface, said thermal spray coating having an average pore diameter of 10 μm or less and a porosity of 8% or less by volume. A piston ring having excellent wear resistance, scuffing resistance and peeling resistance with little attackability on a mating member is obtained by forming a homogeneous thermal spray coating having a fine microstructure.

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JP 2000-345314 (English Machine Translation), Harada et al., High Hardness Carbide, Cermet Sprayed Coating-Coated Member and its Production, Dec. 2000.
Certified English translation of DE 100 61 750 A1, Herbst-Dederichs, Jun. 20, 2002.

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